Less than a year after Maine Gov. Janet Mills’ sports betting peace offering to the state’s four Indian tribes, the first round of proposed regulations include the most stringent advertising guidelines in the country, would force operators to pass at least 60% of revenue to tribes or the state, and could keep top operators from considering entry into the ninth-smallest state in the U.S.

Maine lawmakers last April passed a law crafted and backed by Mills that put legal digital wagering in the hands of tribes and all but shut out the state’s two retail sportsbooks, owned by PENN Entertainment and Churchill Downs Inc., from mobile betting.